Time to rivet and final install the left leading edge to the spar. Whoa!! Riveting the ribs to the spar was a hell of a time, hard and very slow in order to make sure I didn't destroy something. Sticking my hands and arms into the tiny lighting holes to run a rivet gun was quite the challenge. To make this even possible with all solid rivets and the manufactured head on the leading edge rib flange, I had to use a combination of an adjustable mirror, flash lights, my cell phone and a double offset rivet set. A big issue was that the double offset constantly rotated and caused a smiley on the flange. To prevent the double offset from rotating and to hold it in the gun, I used one of man's best friends, duck tape! It's strong and flexible enough to allow the rivet set to hit like it needs to. This worked extremely well given the tight, tight quarters and completely blind riveting. Being completely blind was terrifying at first until I saw it turned out ok. You also have to turn the pressure up about 10-20 psi. All this combined gave very good results and barely any muck ups. Not completely perfect, but I'd say acceptable for sure.
Once the ribs were finally riveted to the spar I could rivet the skin to the spar with the pneumatic squeezer, which was much appreciated after the hell of previous riveting experience. The only bad/sad part is that I have to do this all over again with the right leading edge.